| 摘要 |
<p>A distributed virtual software interface (20) that provides a reusable framework for building large, distributed fault tolerant Ada applications. The software architecture (20) is implemented in a distributed computer system (30) having a plurality of computers (31) that are interconnected by way of a network (13), and wherein each computer (31) has an operating system. The architecture (20) includes a distributed intermediate software layer (21) that is distributed among the plurality of computers (31) and interfaces with the operating system (11) of the computer (31) on which it is disposed. The distributed intermediate software layer (21) generates intermediate instructions that cause the operating system (11) to implement primitive operating system instructions. The distributed virtual software interface (20) has a distributed object-oriented software layer (22) distributed among the plurality of computers (31) that provides communication between computers (31) using objects. The distributed object-oriented software layer (22) includes instructions that distribute objects of the same class to computers (31) that are linked by attributes, operations and associations between objects within a class in response to the creation of a new object on one of the computers (31). Communication between computers (31) is provided using a number of predefined communication protocols. The distributed object-oriented software layer (22) interfaces with the distributed middle software layer (21) disposed on each respective computer (31) and generates the intermediate instructions. At least one software application is provided on each computer (31) that interfaces with the distributed object-oriented software layer (22) and processes objects routed to it.</p> |
